15440b6e43
* Changes to make default route programming correct in multi-asic platform where frr is not running in host namespace. Change is to set correct administrative distance. Also make NAMESPACE* enviroment variable available for all dockers so that it can be used when needed. Signed-off-by: Abhishek Dosi <abdosi@microsoft.com> * Fix review comments * Review comment to check to add default route only if default route exist and delete is successful.
59 lines
2.7 KiB
Bash
Executable File
59 lines
2.7 KiB
Bash
Executable File
#!/usr/bin/env bash
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mkdir -p /etc/frr
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mkdir -p /etc/supervisor/conf.d
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sonic-cfggen -d -t /usr/share/sonic/templates/supervisord/supervisord.conf.j2 > /etc/supervisor/conf.d/supervisord.conf
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CONFIG_TYPE=`sonic-cfggen -d -v 'DEVICE_METADATA["localhost"]["docker_routing_config_mode"]'`
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if [[ ! -z "$NAMESPACE_ID" ]]; then
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# FRR is not running in host namespace so we need to delete
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# default gw kernel route added by docker network via eth0 and add it back
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# with higher administrative distance so that default route learnt
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# by FRR becomes best route if/when available
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GATEWAY_IP=$(ip route show 0.0.0.0/0 dev eth0 | awk '{print $3}')
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#Check if docker default route is there
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if [[ ! -z "$GATEWAY_IP" ]]; then
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ip route del 0.0.0.0/0 dev eth0
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#Make sure route is deleted
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CHECK_GATEWAY_IP=$(ip route show 0.0.0.0/0 dev eth0 | awk '{print $3}')
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if [[ -z "$CHECK_GATEWAY_IP" ]]; then
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# Ref: http://docs.frrouting.org/en/latest/zebra.html#zebra-vrf
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# Zebra does treat Kernel routes as special case for the purposes of Admin Distance. \
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# Upon learning about a route that is not originated by FRR we read the metric value as a uint32_t.
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# The top byte of the value is interpreted as the Administrative Distance and
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# the low three bytes are read in as the metric.
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# so here we are programming administrative distance of 210 (210 << 24) > 200 (for routes learnt via IBGP)
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ip route add 0.0.0.0/0 via $GATEWAY_IP dev eth0 metric 3523215360
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fi
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fi
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fi
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if [ -z "$CONFIG_TYPE" ] || [ "$CONFIG_TYPE" == "separated" ]; then
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sonic-cfggen -d -t /usr/share/sonic/templates/bgpd/bgpd.conf.j2 -y /etc/sonic/constants.yml > /etc/frr/bgpd.conf
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sonic-cfggen -d -t /usr/share/sonic/templates/zebra/zebra.conf.j2 > /etc/frr/zebra.conf
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sonic-cfggen -d -t /usr/share/sonic/templates/staticd/staticd.conf.j2 > /etc/frr/staticd.conf
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echo "no service integrated-vtysh-config" > /etc/frr/vtysh.conf
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rm -f /etc/frr/frr.conf
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elif [ "$CONFIG_TYPE" == "unified" ]; then
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sonic-cfggen -d -y /etc/sonic/constants.yml -t /usr/share/sonic/templates/frr.conf.j2 >/etc/frr/frr.conf
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echo "service integrated-vtysh-config" > /etc/frr/vtysh.conf
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rm -f /etc/frr/bgpd.conf /etc/frr/zebra.conf /etc/frr/staticd.conf
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fi
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chown -R frr:frr /etc/frr/
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sonic-cfggen -d -t /usr/share/sonic/templates/isolate.j2 > /usr/sbin/bgp-isolate
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chown root:root /usr/sbin/bgp-isolate
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chmod 0755 /usr/sbin/bgp-isolate
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sonic-cfggen -d -t /usr/share/sonic/templates/unisolate.j2 > /usr/sbin/bgp-unisolate
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chown root:root /usr/sbin/bgp-unisolate
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chmod 0755 /usr/sbin/bgp-unisolate
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mkdir -p /var/sonic
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echo "# Config files managed by sonic-config-engine" > /var/sonic/config_status
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exec /usr/bin/supervisord
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